Key-fastener



(No Model.)

W. W. MITCHELL. KEY FASTENER.

No. 592,428. Patented Oct. 26,1897.

wr fneds'ws'v I ITCUQ/JCiEO Z? 1/ n jf fmji'ohazz.

UNinn STATES FFICE.

. ATENT KEY-FASTENER.

SPECIFICATION forming part Of Letters Patent NO. 592,428, dated October 26, 1897.

Application filed November 23, 1896. fierial No. 613,119. (No model.)

To all whom, it may concern Be itknown that LWILLIAM W. MITCHELL, a citizen of the United States of America, residing at McKees Rocks, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Key-Fasteners, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in key-fasteners, and has for its object to provide a device that may be secured in the keyhole and prevent the key being turned from the opposite side to that in which it has been inserted in the lock.

The invention aims to provide a device of the above character that will be extremely simple in its construction, strong, durable, effectual in its operation, and comparatively inexpensive to manufacture; furthermore, that will be neat and compact in its form to permit of the fastener being carried in the pocket, if desired.

With the above and other objects in View the invention finally consists in the novel construction, combination, and arrangement of parts, to be hereinafter more specifically described, and particularly pointed out in the claim.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specificatiom and wherein like letters of reference indicate similar parts throughout the several views, in

which- Figure l is a transverse vertical sectional view of a lock, showing the fastener in position to prevent the key from being removed. Fig. 2 is a front view of a portion of a door, showing the lock in position and the fastener in the keyhole. Fig. 3 is a perspective view of the swiveled plate carrying the arms. Fig. 4 is a side elevation of the fastener with the plate shown in Fig. 3 removed.

Referring to the drawings by reference-letters, a a represent the outer plate or casing of the lock, provided with keyholes l) to receive the key 1), these plates and key being all that is thought necessary to illustrate the invention.

The fastener consists of a bar 0, provided with side wings or plates cl 61, said bar having rounded portions cl and d on each side of these wings or plates, and on the flat end is swiveled a keeper 6, having on its free end a finger-catch e. The bar is provided with an aperture f, near the extreme end of the flat portion, to permit of the keeperbeing changed to conform to alarger lock, said keeperbeing secured by means of a screw which permits its easy removal. Between the fiat portion of the bar and the wings, or, in other words, on the portion lettered (Z is swiveled an oblong plate 9, having arms 70 7t and 76' 70. extending on each side thereof to prevent the turning of the bar, as hereinafter more fully explained.

In order to illustrate the manner of operation, we will assume that the device is inserted in the keyhole of the lock in the manner shown in Fig. 1 of the drawings, where it shows the key locked in position.

The keeper 6 is turned on the bar toward the wings and prevents the bar 0 being pushed or pulled through the keyhole sufficiently far to allow the wings d d to clear the arms is k. tVhen it is desired to remove the fastener, the keeper is reversed, when the bar may be pushed into the casing of the lock, thus allowing the wings to pass the arms 70 7a and the bar turned so as to permit the withdrawal of the fastener. By this construction of a fastener the same is reduced to a size that may be easily and conveniently carried in the vest-pocket, making the same invaluable to traveling men and the like, where it may be desired to secure an additional security to that afforded by lock ing the door and permitting the key to remain in the look.

It will be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is p A key-fastener consisting of a bar having a flat and rounded portion, wings projecting from the rounded portion, a keeper swiveled on the flat portion, a plate swiveled on the bar between the wings and flat portion, said plate carrying arms projecting on each side thereof, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAM WV. MITCHELL.

Witnesses:

A. M. WILsoN, H. E. SEIBERT. 

